JAR viewer
To open a JAR file, drop it in the box below. It opens straight away, even with no extension or the wrong one. Your browser opens it on your device: nothing is uploaded.
Open in
Opened on this device, never uploadedDrop or paste another file at any time
What you see
| JAR in the viewer | |
|---|---|
| Manifest | MANIFEST.MF read |
| WAR and EAR | Recognised by their folders |
| Classes | Each opens with its methods and Java version |
| Safety | Read from its headers only: nothing in it is run |
| Extensions | .jar, .war, .ear |
| Upload | None: opened on your device |
What is a JAR file?
In short
A JAR is a Java archive: a ZIP of compiled classes and resources, with a MANIFEST.MF. WAR and EAR files are the web and enterprise kinds.
The main class, title, version and vendor from its manifest, the number of classes, then every file. A .class file opens as its class, methods and Java version.
How to open a JAR file
- Add your JAR. Drop the file in the box, choose it or paste it.
- Look at it. The main class, title, version and vendor from its manifest, the number of classes, then every file. A .class file opens as its class, methods and Java version.
- Take it further. Download any file from inside an archive, or open another file.
Questions
Drop it here: Main-Class is read from its manifest.
No. The package is only read: its manifest and its list of files. Nothing in it runs, and nothing is uploaded.
No. The viewer runs in your browser and opens the file on your device. Nothing is sent anywhere.